TWI532458B - Vacuum breaker, automatic flushing system for toilet, and electronic bidet toilet having the same - Google Patents

Description

Vacuum interrupter, automatic flushing system for toilet, and electronic toilet seat with the flushing system

The invention relates to an electronic Bidet Toilet (EBT), in particular to a vacuum type interrupter which is arranged in an automatic flushing system of an electronic toilet.

In the automatic flushing system of the electronic toilet, in order to prevent the backflow of sewage when a negative pressure occurs in the pipeline, a vacuum interrupter is arranged in the water inlet pipeline. Figure 1 shows a vacuum interrupter 100 for use in an automatic flushing system for a toilet. The vacuum interrupter 100 includes a body portion 101 and a cover portion 102. The body portion 101 and the cover portion 102 collectively define a cavity 103. A water inlet 104 and a water outlet 105 are formed in the body portion 101. An air port 106 and an overflow hole 107 communicating with the air port 106 are formed in the lid portion 102. A spacer 108 and a spacer fixing shaft 109 are provided in the cavity 103. When a negative pressure occurs in the water inlet pipe, the outside air is introduced into the cavity 103 through the air port 106, so that the gasket 108 closes the water inlet 104, thereby preventing the sewage from flowing back into the water inlet pipe. A water retaining cap 110 may be disposed above the cover portion 102 to prevent water from splashing from the air port 106 and the overflow hole 107.

In the vacuum interrupter 100 shown in FIG. 1, the end (upper end) of the inlet pipe section defining the water inlet 104 is flush with the bottom of the cavity 103 without further extending into the cavity 103; Most of the shim fixing shaft 109 is located above the shim 108. This structure results in a low CL (critical water level line) of the toilet, which is difficult to meet certification requirements such as cUPC certification, and results in a larger volume of the vacuum interrupter. Further, the water retaining cap 110 is separately molded and assembled to the cover portion 102, which increases manufacturing and assembly costs.

It is an object of the present invention to provide a vacuum interrupter that can be used in an automatic flushing system for a toilet that can increase the height of the CL line during reverse flow to meet certification requirements. Another object of the invention is to reduce the size of the vacuum breaker. Yet another object of the invention is to reduce the cost of the vacuum breaker.

A first aspect of the present invention provides a vacuum interrupter including a body portion and a cover portion, the body portion and the cover portion collectively defining a cavity integrally formed with a water inlet defining The water pipe section and the outlet pipe section defining the water outlet, the cover portion is formed with an air port, wherein the end portion of the water inlet pipe section extends in the cavity direction in a direction toward the air port.

Preferably, the length of the portion of the inlet pipe section extending within the cavity is greater than half the height of the cavity. More preferably, the end portion of the inlet pipe section extends upwardly within the cavity until it approaches the air port.

Preferably, the vacuum interrupter further includes a gasket movable between a first position for closing the water inlet and a second position for closing the air port, and a pad for fixing the gasket The piece is fixed to the shaft, and the gasket is fixedly axially extended into the inlet pipe section.

In an advantageous embodiment, the cover is integrally formed with a water blocking cap located above the air opening.

In an advantageous embodiment, the vacuum interrupter is further provided with an overflow hole communicating with the air port, and the cover portion is integrally formed with a water stop piece located above the overflow hole.

In still another advantageous embodiment, the vacuum interrupter is further provided with an overflow hole communicating with the air port, and the cover portion is integrally formed with a water retaining cap located above the air port and located at the overflow A water stop above the hole.

A second aspect of the invention provides an automatic flushing system for a toilet having any of the above-described vacuum interrupters.

According to the present invention, the end portion of the inlet pipe section extends in the cavity in the direction toward the air port as compared with the prior art in which the end of the inlet pipe is flush with the bottom of the vacuum interrupter cavity, so that the inlet pipe The height is increased, which increases the height of the CL line during reverse flow. The greater the length of the inlet pipe extending within the cavity, the higher the CL line, making it easier to meet certification requirements.

Furthermore, by arranging the shim fixing shaft to extend downward into the inlet pipe section, the size of the vacuum interrupter is reduced.

In addition, by integrally forming the water retaining cap over the air port and/or the water retaining fin above the overflow hole integrally with the cover portion of the vacuum interrupter, the manufacturing cost is reduced and the assembly process is simplified.

1‧‧‧Water tank

2‧‧‧Float switch

3‧‧‧Electromagnetic inlet valve

4‧‧‧ water inlet

5‧‧‧Total shut-off valve

6‧‧‧Filter

7‧‧‧Return flow valve

8‧‧‧Pressure pump

9‧‧‧Distribution valve

10, 10', 10", 100‧‧‧ vacuum interrupters

11, 101‧‧ ‧ Body Department

12, 102‧‧ ‧ cover

13, 103‧‧‧ cavity

14‧‧‧Inlet pipe section

15‧‧‧Outlet pipe section

16‧‧‧Air port

17, 107‧‧‧ overflow hole

18, 108‧‧‧ shims

19, 109‧‧‧shield fixed shaft

20, 110‧‧ ‧ water cap

21‧‧‧Water retaining tablets

105‧‧‧Water outlet

106‧‧ Air port

Figure 1 is a schematic cross-sectional view of a vacuum interrupter of the prior art.

2 is an automatic flushing system for a toilet according to an embodiment of the present invention Sectional view.

Figure 3 is a schematic cross-sectional view of a vacuum interrupter in accordance with an embodiment of the present invention.

Figure 4 is a schematic cross-sectional view of a vacuum interrupter in accordance with another embodiment of the present invention.

Fig. 5 is a perspective view of the vacuum interrupter shown in Fig. 4.

Fig. 2 schematically shows an automatic flushing system for a toilet according to an embodiment of the present invention. The automatic flushing system for a toilet according to the present invention can be applied to an electronic disposable toilet that can automatically flush after the user uses the toilet. For example, an infrared sensing probe can be placed on the front side wall of the water tank, and the flushing process is initiated when the sensing probe detects that the user has left after using the toilet. Alternatively, a pressure sensor may be disposed on the underside of the toilet seat cushion, and the pressure sensor detects the user's seating on the toilet seat cushion and activates the flushing process correspondingly. An automatic flushing system for a toilet includes a water tank 1. As shown in Fig. 2, the water tank 1 is provided with a float switch 2 which is connected to a float inside the water tank 1. After flushing, the water level inside the water tank 1 drops, and the float drops correspondingly under its own weight. At this time, the float switch 2 is opened, and the electromagnetic water inlet valve 3 is opened correspondingly, and tap water from the water supply pipe enters the water tank 1 through the inlet pipe 4. As the amount of water in the water tank 1 increases, the float switch 2 is turned off, and the electromagnetic water inlet valve 3 is accordingly closed, and the water inlet of the water tank 1 is stopped.

A total shut-off valve 5, a filter 6 and a check-type flow valve 7 are also provided between the water supply pipe and the electromagnetic water inlet valve 3. The flush port of the water tank 1 is connected to the distribution valve 9 via a pressurizing pump 8. The distribution valve 9 is switched from the water tank under the control of the stepping motor M The water flow of 1 is such that the water flow selectively flows to the inner edge flushing port or the jet flushing port of the toilet ceramic cavity. The construction and function of the above-described respective elements are well known to those skilled in the art to which the present invention pertains, and a detailed description thereof will be omitted herein.

In order to prevent backflow of sewage caused by a negative pressure occurring for various reasons in the inlet pipe 4, a vacuum interrupter 10 is also provided in the inlet pipe 4. Two exemplary embodiments of a vacuum interrupter in accordance with the present invention are described in detail below in conjunction with Figures 3-5.

In the embodiment shown in Fig. 3, the vacuum interrupter 10' includes a body portion 11 and a cover portion 12. The body portion 11 and the cover portion 12 collectively define a cavity 13. The body portion 11 is formed with an inlet pipe section 14 and an outlet pipe section 15, which defines a water inlet and is connectable with a water inlet hose downstream of the electromagnetic inlet valve 3, the inlet pipe section 15 defining The water outlet is connected to a hose leading to the water inlet of the water tank 1. An air port 16 and an overflow hole 17 communicating with the air port 16 are formed in the lid portion 12. Excess water in the vacuum interrupter 10' can flow through the overflow port 17 and the overflow pipe connected thereto to the inner edge flush port or the jet flush port of the toilet ceramic cavity. A gasket 18 movable between a first position for closing the water inlet and a second position for closing the air port 16 and a gasket fixing shaft 19 for fixing the gasket 18 are provided in the cavity 13.

The vacuum interrupter 10' operates in the same manner as the prior art vacuum interrupter. Under normal conditions, the gasket 18 abuts against the upper end portion of the inlet pipe section 14 due to its own weight and the weight of the gasket fixing shaft 19. When the water tank 1 needs to be filled with water, the electromagnetic water inlet valve 3 is opened, and the pressure of the tap water causes the gasket 18 and the gasket fixing shaft 19 to move upward, thereby opening the water inlet opening air port 16, and flowing the tap water from the water inlet into the cavity 13 Flowing out through the water outlet and further flowing to the water tank 1 in. When a negative pressure occurs in the water inlet pipe, external air is introduced into the cavity 13 through the air port 16 to prevent the siphon phenomenon from occurring, and the air pressure presses the gasket 18 against the upper end portion of the inlet pipe section to close the water inlet. . Thereby, it is possible to effectively prevent the sewage return passage from being in the water supply line.

As shown in Fig. 3, the tip end portion (and the upper end portion) of the inlet pipe section 14 of the vacuum interrupter 10' extends almost through the cavity 13 and approaches the air port 16 upward. Compared with the vacuum interrupter 100 shown in Fig. 1, this increases the height of the water inlet, thereby increasing the height of the CL line in the case of reverse flow.

Further, since the shim fixing shaft 19 is disposed such that most of it extends downward into the inlet pipe section 14, the size of the vacuum interrupter 10' is reduced. Further, compared with the vacuum interrupter 100 shown in Fig. 1, it is possible to easily form a structure for guiding and supporting the spacer fixing shaft 19 on the inner wall of the inlet pipe section 14, for example, a plurality of circumferential directions. Spaced ribs.

The vacuum interrupter 10" shown in Fig. 4 differs from the vacuum interrupter 10' shown in Fig. 3 mainly in that a water retaining cap 20 is provided above the air port 16, and is overflowing. The water blocking piece 21 is provided above the flow hole 17, so that splashing from the air port 16 or the overflow hole 17 can be reliably prevented. The vacuum type interrupter 100 shown in Fig. 1 is independent of the cover part 102 alone. Unlike the formed water retaining cap 110, the water retaining cap 20 and the water retaining sheet 21 in this embodiment are integrally formed with the lid portion of the vacuum interrupter 10". Thereby, the manufacturing cost is reduced, and the step of assembling the water retaining cap or the water stop to the vacuum interrupter cover is eliminated.

Fig. 5 is a perspective view of the vacuum interrupter 10" shown in Fig. 4, showing the overall structure of the vacuum interrupter. The vacuum mask shown in Fig. 3 is easily known from Fig. 5. Breaker 10' (without water retaining cap 20 and water stop 21) Stereogram.

Although the water retaining cap 20 and the water stop piece 21 are simultaneously provided in the embodiment shown in FIGS. 4 and 5, the water retaining cap 20 and the water retaining piece 21 may be integrally formed only on the cover portion 12. One of them.

In each of the above embodiments, the tip end portion (i.e., the upper end portion) of the inlet pipe section 14 of the vacuum interrupter extends almost through the cavity 13 and approaches the air port 16 upward. However, the invention is not limited thereto. As long as the distal end portion of the inlet pipe section 14 extends a distance in the cavity 13 in the direction toward the air port 16, the technical effect of the CL line at the time of countercurrent flow as compared with the prior art can be achieved. For example, the length of the portion of the inlet pipe section that extends within the cavity may be greater than half the height of the cavity.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, various modifications can be made to the device of the present invention without departing from the scope of the present invention. Improvement and deformation. Other embodiments may also be derived by those of ordinary skill in the art in view of the disclosure herein. The specification and examples are to be considered as illustrative only, and the scope of the invention

10'‧‧‧Vacuum Interrupter

11‧‧‧ Body Department

12‧‧‧ 盖部

13‧‧‧ cavity

14‧‧‧Inlet pipe section

15‧‧‧Outlet pipe section

16‧‧‧Air port

17‧‧‧Overflow hole

18‧‧‧shims

19‧‧‧shield fixed shaft

Claims (8)

A vacuum type interrupter includes a body portion and a cover portion, the body portion and the cover portion collectively defining a cavity integrally formed with an inlet pipe section defining a water inlet and an outlet defining a water outlet a water pipe section, the cover portion is formed with an air port, wherein a distal end portion of the water inlet pipe section extends in the cavity direction toward the air port, and the vacuum interrupter includes a water inlet for closing the water inlet A gasket that moves between a first position and a second position for closing the air port and a gasket securing shaft for securing the gasket, the gasket is fixed axially into the inlet pipe section. The vacuum interrupter of claim 1, wherein the length of the portion of the inlet pipe section extending within the cavity is greater than half the height of the cavity. The vacuum interrupter of claim 2, wherein the end portion of the inlet pipe section extends upward in the cavity until it approaches the air port. The vacuum interrupter according to any one of claims 1 to 3, wherein the cover portion is integrally formed with a water retaining cap located above the air port. The vacuum type interrupter according to any one of the items 1 to 3, wherein an overflow hole communicating with the air port is provided, and the cover portion is integrally formed with the overflow hole. The water stop above. The vacuum interrupter according to any one of claims 1 to 3, further comprising an overflow hole communicating with the air port, and the cover portion is integrally formed above the air port a water retaining cap and a water stop piece above the overflow hole. An automatic flushing system for a toilet, comprising the vacuum interrupter according to any one of claims 1 to 6. An electronic disposable toilet having an automatic flushing system for a toilet as described in claim 7 of the patent application.